〈a, b | aba=ab, bbba=ab〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: right-to-left b/a

Complete rewriting system

1. b¹²a ⇒ b⁶a
2. ab ⇒ b³a
3. b³a² ⇒ b³a

Right Cayley graph (truncated)

Left Cayley graph (truncated)